[teiid-issues] [JBoss JIRA] (TEIID-4861) ASSERTION FAILED: expected reference to be not null

ASSERTION FAILED: expected reference to be not null --------------------------------------------------- Key: TEIID-4861 URL: https://issues.jboss.org/browse/TEIID-4861 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 9.0.2, 9.2.1, 9.2.2 Reporter: Harold Campbell Assignee: Steven Hawkins Fix For: 9.2.3, 9.3 Attachments: DEBUG_LOG, DEBUG_LOG_WORKS I have a vdb containing a multi-source schema (channel) and a single source schema (ops). The following query which uses an aggregate function and groups by both a mulit-source column and a single source column causes the error "TEIID30019 Unexpected exception for request l1HvA1r84nyA.0: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null" and a stack trace which looks quite similar to that in TEIID-4325: {code} select s.channel, m.user_name, count(*) from channel.dbo.service_request s join ops.dbo.manager m on s.staff_id = m.manager_id group by s.channel, m.user_name; {code} Apr 15 20:09:52 localhost docker[27044]: 2017-04-16 01:09:52,237 ERROR [org.teiid.PROCESSOR] (Worker2_QueryProcessorQueue7) l1HvA1r84nyA TEIID30019 Unexpected exception for request l1HvA1r84nyA.0: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.failed(Assertion.java:73) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.isNotNull(Assertion.java:100) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.core.util.Assertion.isNotNull(Assertion.java:92) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalNode.getProjectionIndexes(RelationalNode.java:367) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.JoinNode.initialize(JoinNode.java:133) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:96) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.connectExternal(RelationalPlan.java:102) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.relational.RelationalPlan.initialize(RelationalPlan.java:91) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.init(QueryProcessor.java:226) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.nextBatchDirect(QueryProcessor.java:138) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.QueryProcessor.nextBatch(QueryProcessor.java:114) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:164) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.query.processor.BatchCollector.collectTuples(BatchCollector.java:146) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.processMore(RequestWorkItem.java:477) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:349) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.AbstractWorkItem.run(AbstractWorkItem.java:51) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.RequestWorkItem.run(RequestWorkItem.java:275) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:282) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) Apr 15 20:09:52 localhost docker[27044]: at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210) Apr 15 20:09:52 localhost docker[27044]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) Apr 15 20:09:52 localhost docker[27044]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) Apr 15 20:09:52 localhost docker[27044]: at java.lang.Thread.run(Thread.java:745) Interestingly, if I narrow the query down to specific channels the error goes away: {code} select s.channel, m.user_name, count(*) from channel.dbo.service_request s join ops.dbo.manager m on s.staff_id = m.manager_id where channel in ('oak', 'cypress') group by s.channel, m.user_name; {code} I will attach both query plans.